LAB 3: DMVPN EIGRP. EIGRP over DMVPN. Disclaimer. Pag e

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1 LAB 3: DMVPN EIGRP Disclaimr This Configuration Guid is dsignd to assist mmbrs to nhanc thir skills in rspctiv tchnology ara. Whil vry ffort has bn mad to nsur that all matrial is as complt and accurat as possibl, th nclosd matrial is prsntd on an as is basis. Nithr th authors nor Forum assum any liability or rsponsibility to any prson or ntity with rspct to loss or damags incurrd from th information containd in this guid. This Lab Guid was dvlopd by RSTForum. Any similaritis btwn matrial prsntd in this configuration guid and any othr matrial is compltly coincidntal. EIGRP ovr DMVPN

2 LAB 3: Diagram Not: This Lab was dvlopd on Cisco IOS Vrsion15.2(4) M1 ADVENTERPRISEK9-M.

3 LAB 3: Configur EIGRP ovr DMVPN Configuration Stp 1: Enabl loopback and physical intrfacs on R1, R2, R3, R4 and R5. R1: intrfac FastEthrnt0/0 ip addrss intrfac Loopback1 ip addrss R2: intrfac FastEthrnt1/0 ip addrss intrfac Loopback1 ip addrss R3: intrfac FastEthrnt2/0 ip addrss intrfac Loopback1 ip addrss R4: intrfac FastEthrnt3/0 ip addrss intrfac Loopback1

4 ip addrss R5: intrfac FastEthrnt0/0 ip addrss intrfac FastEthrnt1/0 ip addrss intrfac FastEthrnt2/0 ip addrss intrfac FastEthrnt3/0 ip addrss Stp 2: Assign dfault rout pointing towards intrnt. R1: ip rout R2: ip rout R3: ip rout R4: ip rout Stp 3: Configur DMVPN R1: intrfac Tunnl 0 ip addrss !(logical ip addrss)

5 ip nhrp map multicast dynamic ip nhrp ntwork-id 5 will not form) tunnl sourc tunnl mod gr multipoint ip mtu 1400!(nabl multicast traffic)!(assign sam ntwork-id ls tunnl!(physical addrss of HUB intrfac)!(slct gr mod)!(chang mtu for DMVPN hadr) R2: intrfac Tunnl 0 ip addrss ip nhrp ntwork-id 5 tunnl sourc ip nhrp map !(pointing towards NHS srvr) ip nhrp map multicast !(allow multicast traffic from R2 (spok) to R1 (Hub)) ip nhrp nhs !(dsignats R1 as th NHS) tunnl mod gr multipoint ip mtu 1400 R3: intrfac Tunnl 0 ip addrss ip nhrp ntwork-id 5 tunnl sourc ip nhrp map ip nhrp map multicast ip nhrp nhs tunnl mod gr multipoint ip mtu 1400 R4: intrfac Tunnl 0 ip addrss ip nhrp ntwork-id 5 tunnl sourc ip nhrp map ip nhrp map multicast ip nhrp nhs tunnl mod gr multipoint ip mtu 1400

6 Stp 4: Configur EIGRP on routr. R1: routr igrp 100 ntwork ntwork R2: routr igrp 100 ntwork ntwork R3: routr igrp 100 ntwork ntwork R4: routr igrp 100 ntwork ntwork Stp 5: Vrification R1#show ip rout Cods: L - local, C - connctd, S - static, R - RIP, M - mobil, B - BGP D - EIGRP, EX - EIGRP xtrnal, O - OSPF, IA - OSPF intr ara N1 - OSPF NSSA xtrnal typ 1, N2 - OSPF NSSA xtrnal typ 2 E1 - OSPF xtrnal typ 1, E2 - OSPF xtrnal typ 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS lvl-1, L2 - IS-IS lvl-2 ia - IS-IS intr ara, * - candidat dfault, U - pr-usr static rout o - ODR, P - priodic downloadd static rout, H - NHRP, l - LISP + - rplicatd rout, % - nxt hop ovrrid Gatway of last rsort is to ntwork

7 S* /0 [1/0] via /8 is variably subnttd, 2 subnts, 2 masks C /24 is dirctly connctd, Loopback1 L /32 is dirctly connctd, Loopback /24 is subnttd, 1 subnts D [90/ ] via , 00:20:28, Tunnl /24 is subnttd, 1 subnts D [90/ ] via , 00:19:53, Tunnl /24 is subnttd, 1 subnts D [90/ ] via , 00:19:27, Tunnl /16 is variably subnttd, 2 subnts, 2 masks C /30 is dirctly connctd, FastEthrnt0/0 L /32 is dirctly connctd, FastEthrnt0/ /24 is variably subnttd, 2 subnts, 2 masks C /24 is dirctly connctd, Tunnl0 L /32 is dirctly connctd, Tunnl0 R2#show ip rout Cods: L - local, C - connctd, S - static, R - RIP, M - mobil, B - BGP D - EIGRP, EX - EIGRP xtrnal, O - OSPF, IA - OSPF intr ara N1 - OSPF NSSA xtrnal typ 1, N2 - OSPF NSSA xtrnal typ 2 E1 - OSPF xtrnal typ 1, E2 - OSPF xtrnal typ 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS lvl-1, L2 - IS-IS lvl-2 ia - IS-IS intr ara, * - candidat dfault, U - pr-usr static rout o - ODR, P - priodic downloadd static rout, H - NHRP, l - LISP + - rplicatd rout, % - nxt hop ovrrid Gatway of last rsort is to ntwork S* /0 [1/0] via /24 is subnttd, 1 subnts D [90/ ] via , 00:24:32, Tunnl /8 is variably subnttd, 2 subnts, 2 masks C /24 is dirctly connctd, Loopback1 L /32 is dirctly connctd, Loopback /16 is variably subnttd, 2 subnts, 2 masks C /30 is dirctly connctd, FastEthrnt1/0 L /32 is dirctly connctd, FastEthrnt1/ /24 is variably subnttd, 2 subnts, 2 masks C /24 is dirctly connctd, Tunnl0 L /32 is dirctly connctd, Tunnl0 R3#show ip rout

8 Cods: L - local, C - connctd, S - static, R - RIP, M - mobil, B - BGP D - EIGRP, EX - EIGRP xtrnal, O - OSPF, IA - OSPF intr ara N1 - OSPF NSSA xtrnal typ 1, N2 - OSPF NSSA xtrnal typ 2 E1 - OSPF xtrnal typ 1, E2 - OSPF xtrnal typ 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS lvl-1, L2 - IS-IS lvl-2 ia - IS-IS intr ara, * - candidat dfault, U - pr-usr static rout o - ODR, P - priodic downloadd static rout, H - NHRP, l - LISP + - rplicatd rout, % - nxt hop ovrrid Gatway of last rsort is to ntwork S* /0 [1/0] via /24 is subnttd, 1 subnts D [90/ ] via , 00:24:39, Tunnl /8 is variably subnttd, 2 subnts, 2 masks C /24 is dirctly connctd, Loopback1 L /32 is dirctly connctd, Loopback /16 is variably subnttd, 2 subnts, 2 masks C /30 is dirctly connctd, FastEthrnt2/0 L /32 is dirctly connctd, FastEthrnt2/ /24 is variably subnttd, 2 subnts, 2 masks C /24 is dirctly connctd, Tunnl0 L /32 is dirctly connctd, Tunnl0 R4#show ip rout Cods: L - local, C - connctd, S - static, R - RIP, M - mobil, B - BGP D - EIGRP, EX - EIGRP xtrnal, O - OSPF, IA - OSPF intr ara N1 - OSPF NSSA xtrnal typ 1, N2 - OSPF NSSA xtrnal typ 2 E1 - OSPF xtrnal typ 1, E2 - OSPF xtrnal typ 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS lvl-1, L2 - IS-IS lvl-2 ia - IS-IS intr ara, * - candidat dfault, U - pr-usr static rout o - ODR, P - priodic downloadd static rout, H - NHRP, l - LISP + - rplicatd rout, % - nxt hop ovrrid Gatway of last rsort is to ntwork S* /0 [1/0] via /24 is subnttd, 1 subnts D [90/ ] via , 00:26:44, Tunnl /8 is variably subnttd, 2 subnts, 2 masks C /24 is dirctly connctd, Loopback1 L /32 is dirctly connctd, Loopback /16 is variably subnttd, 2 subnts, 2 masks C /30 is dirctly connctd, FastEthrnt3/0

9 L C L /32 is dirctly connctd, FastEthrnt3/ /24 is variably subnttd, 2 subnts, 2 masks /24 is dirctly connctd, Tunnl /32 is dirctly connctd, Tunnl0 (Spok R2, R3 and R4 ar not rciving routs from othr spok routrs. This is du to ip split-horizon nabl on hub routr, thus not allowing th hub to snd routs via sam intrfac.) Stp 6: Disabl split-horizon on hub i R1 routr. R1:! (To rciv routs from on spok routr to othr spok routr.) intrfac tunnl 0 no ip split-horizon igrp 100 Stp 7: Vrification R2#show ip rout Cods: L - local, C - connctd, S - static, R - RIP, M - mobil, B - BGP D - EIGRP, EX - EIGRP xtrnal, O - OSPF, IA - OSPF intr ara N1 - OSPF NSSA xtrnal typ 1, N2 - OSPF NSSA xtrnal typ 2 E1 - OSPF xtrnal typ 1, E2 - OSPF xtrnal typ 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS lvl-1, L2 - IS-IS lvl-2 ia - IS-IS intr ara, * - candidat dfault, U - pr-usr static rout o - ODR, P - priodic downloadd static rout, H - NHRP, l - LISP + - rplicatd rout, % - nxt hop ovrrid Gatway of last rsort is to ntwork S* /0 [1/0] via /24 is subnttd, 1 subnts D [90/ ] via , 00:39:50, Tunnl /8 is variably subnttd, 2 subnts, 2 masks C /24 is dirctly connctd, Loopback1 L /32 is dirctly connctd, Loopback /24 is subnttd, 1 subnts D [90/ ] via , 00:00:16, Tunnl /24 is subnttd, 1 subnts D [90/ ] via , 00:00:16, Tunnl /16 is variably subnttd, 2 subnts, 2 masks C /30 is dirctly connctd, FastEthrnt1/0 L /32 is dirctly connctd, FastEthrnt1/0

10 C L /24 is variably subnttd, 2 subnts, 2 masks /24 is dirctly connctd, Tunnl /32 is dirctly connctd, Tunnl0 R3#show ip rout Cods: L - local, C - connctd, S - static, R - RIP, M - mobil, B - BGP D - EIGRP, EX - EIGRP xtrnal, O - OSPF, IA - OSPF intr ara N1 - OSPF NSSA xtrnal typ 1, N2 - OSPF NSSA xtrnal typ 2 E1 - OSPF xtrnal typ 1, E2 - OSPF xtrnal typ 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS lvl-1, L2 - IS-IS lvl-2 ia - IS-IS intr ara, * - candidat dfault, U - pr-usr static rout o - ODR, P - priodic downloadd static rout, H - NHRP, l - LISP + - rplicatd rout, % - nxt hop ovrrid Gatway of last rsort is to ntwork S* /0 [1/0] via /24 is subnttd, 1 subnts D [90/ ] via , 00:39:30, Tunnl /24 is subnttd, 1 subnts D [90/ ] via , 00:02:40, Tunnl /8 is variably subnttd, 2 subnts, 2 masks C /24 is dirctly connctd, Loopback1 L /32 is dirctly connctd, Loopback /24 is subnttd, 1 subnts D [90/ ] via , 00:02:40, Tunnl /16 is variably subnttd, 2 subnts, 2 masks C /30 is dirctly connctd, FastEthrnt2/0 L /32 is dirctly connctd, FastEthrnt2/ /24 is variably subnttd, 2 subnts, 2 masks C /24 is dirctly connctd, Tunnl0 L /32 is dirctly connctd, Tunnl0 R4#show ip rout Cods: L - local, C - connctd, S - static, R - RIP, M - mobil, B - BGP D - EIGRP, EX - EIGRP xtrnal, O - OSPF, IA - OSPF intr ara N1 - OSPF NSSA xtrnal typ 1, N2 - OSPF NSSA xtrnal typ 2 E1 - OSPF xtrnal typ 1, E2 - OSPF xtrnal typ 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS lvl-1, L2 - IS-IS lvl-2 ia - IS-IS intr ara, * - candidat dfault, U - pr-usr static rout o - ODR, P - priodic downloadd static rout, H - NHRP, l - LISP + - rplicatd rout, % - nxt hop ovrrid Gatway of last rsort is to ntwork

11 S* /0 [1/0] via /24 is subnttd, 1 subnts D [90/ ] via , 00:41:06, Tunnl /24 is subnttd, 1 subnts D [90/ ] via , 00:03:16, Tunnl /24 is subnttd, 1 subnts D [90/ ] via , 00:03:16, Tunnl /8 is variably subnttd, 2 subnts, 2 masks C /24 is dirctly connctd, Loopback1 L /32 is dirctly connctd, Loopback /16 is variably subnttd, 2 subnts, 2 masks C /30 is dirctly connctd, FastEthrnt3/0 L /32 is dirctly connctd, FastEthrnt3/ /24 is variably subnttd, 2 subnts, 2 masks C /24 is dirctly connctd, Tunnl0 L /32 is dirctly connctd, Tunnl0 (Now all routs larnd from hub as wll as vry spok routr dynamically using EIGRP.) Stp 8: Vrify DMVPN tunnls. R1#show dmvpn Lgnd: Attrb --> S - Static, D - Dynamic, I - Incomplt N - NATd, L - Local, X - No Sockt # Ent --> Numbr of NHRP ntris with sam NBMA pr NHS Status: E --> Expcting Rplis, R --> Rsponding, W --> Waiting UpDn Tim --> Up or Down Tim for a Tunnl ============================================== ======================== Intrfac: Tunnl0, IPv4 NHRP Dtails Typ:Hub, NHRP Prs:3, # Ent Pr NBMA Addr Pr Tunnl Add Stat UpDn Tm Attrb UP 00:52:46 D UP 00:52:12 D UP 00:51:43 D R2#show dmvpn Lgnd: Attrb --> S - Static, D - Dynamic, I - Incomplt N - NATd, L - Local, X - No Sockt # Ent --> Numbr of NHRP ntris with sam NBMA pr

12 NHS Status: E --> Expcting Rplis, R --> Rsponding, W --> Waiting UpDn Tim --> Up or Down Tim for a Tunnl ============================================== ======================== Intrfac: Tunnl0, IPv4 NHRP Dtails Typ:Spok, NHRP Prs:2, # Ent Pr NBMA Addr Pr Tunnl Add Stat UpDn Tm Attrb UP 00:53:37 S R3#show dmvpn Lgnd: Attrb --> S - Static, D - Dynamic, I - Incomplt N - NATd, L - Local, X - No Sockt # Ent --> Numbr of NHRP ntris with sam NBMA pr NHS Status: E --> Expcting Rplis, R --> Rsponding, W --> Waiting UpDn Tim --> Up or Down Tim for a Tunnl ============================================== ======================== Intrfac: Tunnl0, IPv4 NHRP Dtails Typ:Spok, NHRP Prs:1, # Ent Pr NBMA Addr Pr Tunnl Add Stat UpDn Tm Attrb UP 00:51:41 S R4#show dmvpn Lgnd: Attrb --> S - Static, D - Dynamic, I - Incomplt N - NATd, L - Local, X - No Sockt # Ent --> Numbr of NHRP ntris with sam NBMA pr NHS Status: E --> Expcting Rplis, R --> Rsponding, W --> Waiting UpDn Tim --> Up or Down Tim for a Tunnl ============================================== ======================== Intrfac: Tunnl0, IPv4 NHRP Dtails Typ:Spok, NHRP Prs:2, # Ent Pr NBMA Addr Pr Tunnl Add Stat UpDn Tm Attrb UP 00:52:45 S R4#tracrout sourc loopback 1 Typ scap squnc to abort. Tracing th rout to

13 VRF info: (vrf in nam/id, vrf out nam/id) msc 148 msc msc 150 msc (Spok routr R4 ia abl to rach R2 via hub routr. A packt dstind from R4 to R2 would nd to b routd through R1 to R4 tunnl and th gt rncapsulatd to ntr R2 tunnl.) R4#show dmvpn Lgnd: Attrb --> S - Static, D - Dynamic, I - Incomplt N - NATd, L - Local, X - No Sockt # Ent --> Numbr of NHRP ntris with sam NBMA pr NHS Status: E --> Expcting Rplis, R --> Rsponding, W --> Waiting UpDn Tim --> Up or Down Tim for a Tunnl ============================================== ======================== Intrfac: Tunnl0, IPv4 NHRP Dtails Typ:Spok, NHRP Prs:2, # Ent Pr NBMA Addr Pr Tunnl Add Stat UpDn Tm Attrb UP 00:52:45 S UP 00:42:43 D (Notic that th tunnl to R4 has bn flaggd as dynamic in contrast to th static tunnl to th hub/nhs.) R4#tracrout sourc loopback 1 Typ scap squnc to abort. Tracing th rout to VRF info: (vrf in nam/id, vrf out nam/id) msc 148 msc (Onc th dynamically tunnl is formd is formd btwn spok to spok routr, DMVPN allows to spok to spok dirctly communication at nxt hop thus bypassing th hub routr compltly.)